Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
dim-witted is an adjective meaning "lacking mental capacity and subtlety". It carries one recorded sense.
lacking mental capacity and subtlety
Definitions, synonyms and semantic relations for dim-witted come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.